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| Fernandes Júnior,Paulo Ivan; Lima,Andréa Aparecida de; Passos,Samuel Ribeiro; Gava,Carlos Alberto Tuão; Oliveira,Paulo Jansen de; Rumjanek,Norma Gouvêa; Xavier,Gustavo Ribeiro. |
| This study evaluated 26 pigeonpea rhizobial isolates according to their cultural characteristics, intrinsic antibiotic resistance, salt and temperature tolerance, carbon source utilization and amylolytic activity. The cultural characterization showed that the majority of them presented the ability to acidify the YMA. Among the 27 isolates evaluated, 25 were able to grow when incubated at 42° C and 11 showed tolerance to 3% (w/v) of NaCl in YMA medium. The patterns of carbon sources utilization was very diverse among the isolates. It was observed the capacity of three strains to metabolize all the carbon sources evaluated and a total of 42% of the bacterial isolates was able to grow in the culture medium supplemented with at least, six carbon sources. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Strain selection; Biological nitrogen fixation; Biotechnology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400045 |
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| Fernandes Júnior,Paulo Ivan; Rohr,Tiago Gusmão; Oliveira,Paulo Jansen de; Xavier,Gustavo Ribeiro; Rumjanek,Norma Gouvêa. |
| The aim of this work was to evaluate the efficiency of carboxymethyl cellulose (CMC) and starch blends as carrier materials of rhizobial inoculants regarding their capacity to maintain viable cells and promote cowpea (Vigna unguiculata) nodulation. The experimental design adopted was completely randomized, with three replicates. Forty different compositions of carboxymethyl cellulose (CMC) with starch, compatibilized or not with different proportions of MgO or ZnO, were evaluated regarding their ability of maintaining rhizobial viable cells during the storage period of one month at room temperature, in an initial screening. Thereafter, selected inoculant carrier blends were evaluated regarding their ability to maintain viable rhizobial cells for a period... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium japonicum; Vigna unguiculata; Biological nitrogen fixation; Carboxymethyl cellulose; Inoculant technology; Polymer blends. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900017 |
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| Fernandes Júnior,Paulo Ivan; Almeida,João Pedro da Silva; Passos,Samuel Ribeiro; Oliveira,Paulo Jansen de; Rumjanek,Norma Gouvêa; Xavier,Gustavo Ribeiro. |
| O objetivo deste trabalho foi avaliar a produção e o comportamento reológico de exopolissacarídeos (EPS) produzidos por rizóbios isolados de nódulos de guandu [Cajanus cajan (L.) Millsp.], e a similaridade desses isolados, pela técnica de análise de restrição do DNA ribossomal amplificado. As bactérias foram cultivadas em meio YM líquido e os EPS foram obtidos por precipitação com etanol gelado a partir do caldo de cultivo. Em seguida, eles foram recuperados por centrifugação, secados a vácuo, pesados e ressuspensos em água para avaliações reológicas. Os três isolados avaliados apresentaram diferenças na produção e na eficiência relativa da produção de EPS, com destaque para o isolado 8.1c. Os EPS demonstraram comportamento não newtoniano e pseudoplástico,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cajanus cajan; ARDRA; Biopolímeros; Fixação biológica de nitrogênio; Inovação tecnológica; Reologia. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001200018 |
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